JP2008245610A - Combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To lightly operate a belt type continuously variable transmission arranged in a transmission system from an engine to a threshing apparatus with little wear of a belt. <P>SOLUTION: A combine harvester is obtained by arranging a relay apparatus 20 for changing the stretch direction of both transmission belts between the transmission belt 34 on the upstream side and the transmission belt 35 on the downstream side in the transmission direction and interposing the belt type continuously variable transmission 25 changing the rotational speed of a threshing cylinder on the transmission upstream side of the relay apparatus 20 in a belt transmission mechanism from the engine 10 to the threshing apparatus 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a combine configured by arranging a belt transmission mechanism in a transmission system from an engine to a threshing apparatus.

  In this type of combine, a threshing device and a grain tank are mounted in parallel on the left and right on the traveling machine body, and an engine is deployed in front of the grain tank. A transmission system from the engine to the threshing device is provided with a belt transmission mechanism, and a belt-type continuously variable transmission device is known as a speed change driving means of the threshing device (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 10-313654 (paragraph [0026], FIGS. 1 and 4)

As described above, when the transmission system from the engine to the threshing device is configured by the belt transmission mechanism, it is useful for simplifying and reducing the weight of the transmission mechanism, and is adopted in many combiners.
And in a threshing apparatus, depending on the kind of grain to be threshed and the dryness and humidity, there is a case where a shift of the barrel rotation speed is desired. When the belt type continuously variable transmission as described above is used as the means for performing the speed change, there is an excellent advantage that it is useful for simplifying the structure of the speed change means and reducing the weight.
However, in the structure described in Patent Document 1, the belt-type continuously variable transmission is used as a final stage of input to the cylinder using a transmission belt wound around a pulley provided on the cylinder driving shaft. It is comprised so that a speed change operation may be performed. In this structure, a continuously variable transmission operation is performed using a transmission belt on which a large driving torque is applied, and therefore, friction caused when operating the split pulley against a large driving load acting on the belt. , The transmission belt is greatly worn out and the operation itself is heavy.

  The object of the present invention is to adopt a belt transmission mechanism as a transmission system from an engine to a threshing device, and to operate a belt type continuously variable transmission provided in the belt transmission mechanism with little belt wear and lightness. The purpose is to provide a combine that is made possible.

The technical means of the present invention taken in order to achieve the above object has the following structural features and operational effects.
[Solution 1]
The present invention provides a threshing device and a grain recovery device mounted on a traveling machine body in parallel on the left and right sides of the traveling machine body, and the engine is disposed in front of the grain recovery device. The transmission system from the threshing device is configured with a belt transmission mechanism, and during this belt transmission mechanism, the tensioning direction of both transmission belts is changed between the upper transmission belt and the lower transmission belt in the transmission direction. And a belt-type continuously variable transmission capable of changing the rotation speed of the barrel is provided closer to the transmission side than the relay device.

[Function and effect]
As described above, in the present invention, between the upper transmission belt and the lower transmission belt in the transmission direction, on the transmission upper side than the relay device provided to change the tensioning direction of both transmission belts, A belt type continuously variable transmission that can change the rotation speed of the barrel is interposed. Therefore, the transmission belt is located on the upper side of the transmission and has a relatively small driving load and can be driven with a low torque compared to the structure in which the transmission operation is performed by the transmission belt stretched on the pulley of the barrel drive shaft. Since the gears are shifted by operating the, there are advantages that the transmission belt is less worn and is relatively light and easy to operate.

[Solution 2]
In the combine according to the present invention, as described in claim 2, the belt transmission mechanism extends rearward along the lateral wall of the threshing device, and inputs the handling cylinder driving force from the rear side of the threshing device. In the side portion of the threshing device, a conveyor that lifts and conveys the grain threshed by the threshing device to the grain collecting device side is spaced from the side wall of the threshing device. The belt transmission mechanism may be disposed through this interval.

[Function and effect]
As described above, if the belt transmission mechanism is extended to the rear side along the lateral side wall of the threshing device and arranged to input the handling cylinder driving force from the rear side of the threshing device, it is advantageous in the following points. is there.
In other words, compared to the front side of the threshing device, it is easier to introduce the cereal by tapering the front end side of the barrel, or on the rear side where a large opening for introducing the cereal is not required. The pulley for driving the cylinder can be set without being limited by the tapered portion of the handling cylinder or the size of the opening for introducing the culm. Therefore, a large speed reduction action can be obtained at the final stage of the transmission system by using a pulley having a large diameter as a pulley for driving the barrel.
As a result, the transmission torque in the belt-type continuously variable transmission portion arranged on the upper side in the transmission direction is set as low as possible than the transmission belt stretched on the pulley of the barrel drive shaft, making it even lighter There is an effect that can be operated.
Further, in extending the belt transmission mechanism to the rear side, since the belt transmission mechanism is disposed through the space between the lateral wall of the threshing device and the conveyor disposed with a space between the lateral wall. The transmission belt extended to the rear side of the threshing device is arranged in a state protected by the lateral wall and the conveyor. Therefore, there is an advantage that a special member for protecting the transmission belt extending to the rear side of the threshing device can be omitted or reduced.

[Solution 3]
In the combine according to the present invention, as described in claim 3, the relay device is located between the upper transmission belt and the lower transmission belt in the transmission direction so that the rotation surfaces of both transmission belts intersect each other. The direction change bevel case is configured to change the direction of the bevel case, and the rotation surface of the transmission belt on the upper side in the transmission direction is along the side wall of the threshing device, and the transmission on the lower side in the transmission direction. The position of the belt winding pulley may be set and arranged so that the rotation surface of the belt follows the rear wall of the threshing device.

[Function and effect]
According to the above configuration, the belt winding pulley of the direction-changing bevel case has the rotation surface of the transmission belt on the upper side in the transmission direction along the lateral wall of the threshing device, and the rotation surface of the transmission belt on the lower side in the transmission direction. Since the position of the transmission belt is determined along the rear wall of the threshing device, the advantage is that it is easy to arrange the transmission belt compactly along the wall surface by using a bevel case for changing direction as a relay device. There is.

[Solution 4]
In the combine according to the present invention, the direction changing bevel case is disposed above the rear part of the threshing device, and the input upper transmission belt for the direction changing bevel case is a grain. The belt-type continuously variable transmission is configured by using this transmission belt that is disposed between two shafts that are separated from each other on the rear side of the machine body relative to the location where the conveyor for conveyance is disposed.

[Function and effect]
According to the above configuration, there is a grain conveyor on the lateral side of the threshing device, and the belt-type continuously variable transmission that requires a certain amount of inter-axis distance is used. Thus, by arranging vertically in the vertical direction, there is an advantage that it can be arranged compactly on the combine body regardless of the existence of the grain conveying conveyor.

Hereinafter, an example of an embodiment of the present invention will be described based on the drawings.
[Overall structure of the combine]
FIG. 1 shows an entire side face of a full-pile type combine that is an example of a combine according to the present invention, and FIG. 2 shows a plane around a threshing portion of the combine.
The combine includes a traveling unit 2 having a pair of left and right crawler traveling devices 1, an operation unit 3 with a cabin, an axial flow type threshing device 4 configured in a full throwing type, and a screw type unloader 50. The grain tank 5 as a grain recovery device is mounted, and the pretreatment device 6 connected to the front portion of the threshing device 4 so as to be swingable up and down around the fulcrum p extends and retracts the hydraulic cylinder 60 for raising and lowering. Equipped to be driven up and down by operation.

The pretreatment device 6 has a structure in which a cutting unit 62 having a cutting width substantially the same as the horizontal width of the machine body is connected to a front end of a feeder 61 for transferring a cutting crop.
The mowing unit 62 is provided with a clipper-type mowing device 64 and an auger 65 that laterally feeds the harvested crop and sends it to the start end of the feeder 61. The mowing unit 62 swings up and down integrally with the feeder 61. In addition, above the front part of the cutting part 62, a scraping reel 63 for scraping the planted crops backward is provided.

The threshing device 4 is configured as follows.
As shown in FIGS. 4 to 6, in the upper half of the threshing device 4, there is provided a handling chamber 40 in which a handling cylinder 41 in which handling teeth are implanted in a spiral shape is pivotally supported in the front-rear and horizontal directions. A receiving net (concave) 42 is provided along the lower side of 40, and the processed material leaked from the receiving net 42 is placed under the handling chamber 40 in the first (fine), second, and A sorting unit 43 for sorting dust is provided.

The sorting unit 43 includes a sorting case 44 for sorting the processed material leaked from the receiving net 42 while swinging and moving backward, a tang 45 for supplying the sorting wind toward the sorting case 44, and the rear of the handling chamber 40. A rotating chopper 47 that shreds large straw waste discharged from the dust feed port at the end and straw waste discharged from the dust discharge port at the rear end of the sorting unit is provided.
A first collection unit 46A and a second collection unit 46B are respectively provided at the lower part of the sorting unit 43, and the first item is sent to the grain tank 5 by a lifting device 48 constituted by a bucket conveyor, The second item is transported by a second reduction device 49 constituted by a bucket conveyor and supplied to the front portion of the handling chamber 40 in a reduced manner.

In the sorting case 44, a glen pan 44A, a chaff sheave 44B capable of changing and adjusting the grain passage amount, and a strolac 44C are arranged in this order on the upper side, and a fine sieve 44D for fine selection is arranged on the lower side.
Among these, the chaff plate 9 constituting the chaff sheave 44B is configured as follows.
As shown in FIG. 8, the group of cha-flip plates 9 is arranged on the sorting case 44 via a connecting member 91 so as to be swingable around the lateral axis x of the support pin 90 set at each upper end thereof. While being pivotally connected to the left and right side wall portions, their lower ends are connected to each other by a connecting plate 93 that can be pushed and pulled via a connecting pin 92 so that the posture can be changed.

The char flip plate 9 is configured as shown in FIG.
9A shows a cross section taken along the line aa in FIG. 8, and FIG. 9B shows a cross section taken along the line bb in FIG. As shown in this figure, the workpiece guide surface of the char flip plate 9 is composed of a lateral surface 94 along the radial direction of the horizontal axis x and an upward surface 95 in a direction orthogonal to the surface. ing.
The structure shown in FIGS. 9 (a) and 9 (b) is a cross-sectional view of the cha-flip plate 9 configured for soybean threshing. However, it is set so as not to protrude from the tangent L to the outer peripheral surface of the upper support pin 90 and the lower connecting pin 91 so that the minimum distance between the adjacent cha-flip plates 9 is relatively wide. .
The structure shown in FIG. 10 shows the cross-sectional structure of the rice / wheat tea flip plate 9 at the same location as the cross section along the line aa in FIG. The surface 95 is formed so as to protrude from the tangent line L, and the minimum distance from the adjacent char flip plate 9 is relatively narrow.

The grain tank 5 has a receiving port from the lifting device 48 at the top, and a bottom screw 51 is provided along the bottom of the tank, and the grain sent rearward by the bottom screw 51 is the unloader 50. It is designed to be supplied to the lower end of the.
The unloader 50 includes a vertical feed screw driven in conjunction with the bottom screw 51 and a lateral feed screw interlocked with the upper end of the unloader 50. The unloader 50 swivels around the vertical axis y and undulates around the horizontal axis. It is configured to move freely.

  The front part of the handling room 40 by taking out the second thing from the lifting device 48 for transferring the grain from the first recovery part 46A of the threshing device 4 to the grain tank 5 and the second recovery part 46B of the threshing device 4 Each of the second reduction devices 49 for returning to the above is constituted by a bucket type conveyor in which a bucket conveyor is housed inside the lifting cylinders 48A and 49A. The lifting cylinders 48 </ b> A and 49 </ b> A are provided with a predetermined distance s between the threshing device 4 and the lateral wall 4 </ b> A. The interval s is set to a dimension that allows a transmission belt of a transmission mechanism to be described later to be disposed within the interval s.

[Power transmission structure]
An engine 10 is arranged below the operation unit 3, and a power transmission structure from the output shaft 11 of the engine 10 to each driving device is shown in FIGS. 3 and 5 to 7.

The power from the output shaft 11 of the engine 10 is divided into a traveling system and a working system. The power of the traveling system is input to a hydrostatic continuously variable transmission (HST) 12 and is then shifted through a transmission case 13. It is transmitted to the left and right crawler traveling devices 1.
The power of the work system is divided into two systems, a threshing system and a grain recovery system. The power of the threshing system is applied to the countershaft 14 of the threshing device 4 via the threshing system transmission belt 31. 30, and the branch power of the other grain recovery system is transmitted to the bottom screw 51 of the grain tank 5 via the recovery system transmission belt 32.

  Various operating parts provided in the threshing device 4 are driven by the power transmitted to the countershaft 14 of the threshing device 4, and the feeder 61 and the cutting unit 62 are driven by the power branched by the countershaft 14.

  That is, the counter shaft 14 and the input shaft 68 at the base end of the feeder are belt-coupled via a tension type mowing clutch 69, and the scraping conveyor built in the feeder 61 first with the power transmitted to the input shaft 68. 66 is driven. Then, the power extracted from the projecting end portion of the input shaft 68 toward the left side of the machine body is supplied to the cutting unit 62 via the feeder 61 and a winding transmission mechanism 67 provided along the left outer surface of the cutting unit 62. It is transmitted to the mowing device 64, the auger 65, and the take-up reel 63.

The power transmitted to the countershaft 14 of the threshing device 4 is transmitted to the barrel input shaft 16 provided on the rear wall side of the threshing device 4 via a belt transmission mechanism as shown in FIGS. 3 and 5 to 7. Is done.
That is, the relay shaft 15 is provided near the rear bottom on the side surface 4A side of the threshing device 4, and the first transmission belt 33 extends over the input pulley 15A provided on the relay shaft 15 and the output pulley 14A provided on the counter shaft 14. Is wound.
A second transmission belt 34 is wound between the output pulley 15B of the relay shaft 15 and the input pulley 21A of the input shaft 21 of the direction changing bevel case 20 as a relay device disposed at the upper portion thereof, thereby changing the direction. A third transmission belt 35 is wound between the output pulley 22 </ b> A of the output shaft 22 of the bevel case 20 and the input pulley 16 </ b> A of the barrel input shaft 16.

In the direction changing bevel case 20, the input shaft 21 and the output shaft 22 are interlocked via bevel gears 21B and 22B provided on one end side in the case, and are provided in a state of being orthogonal to each other. The input pulley 21A provided on the other end side of the input shaft 21 is along the lateral wall 4A of the threshing device 4, and the output pulley 22A provided on the other end side of the output shaft 22 is the rear wall of the threshing device 4. It is provided in a state along 4B.
21 A of said input pulleys are comprised with the split pulley elastically biased to the mutually adjacent side, and the combination with the operation body 24 which can change the tension with respect to the said 2nd transmission belt 34 forcibly is carried out. Thus, a belt type continuously variable transmission 25 that can change a belt winding diameter by the split pulley is configured.

  The first transmission belt 33 wound around the output pulley 14A provided on the counter shaft 14 and the input pulley 15A provided on the relay shaft 15 includes the lateral wall 4A of the threshing device 4, the lifting device 48, and the second reduction gear. It is arranged within the predetermined interval s formed between the lifting cylinders 48A and 49A of the device 49. Accordingly, the lifting cylinders 48 </ b> A and 49 </ b> A of the lifting device 48 and the second reduction device 49 function as protection means for the first transmission belt 33.

  The input pulley 16A of the barrel input shaft 16 provided on the rear wall 4B side of the threshing device 4 has a considerably larger diameter than the output pulley 22A provided on the output shaft 22 of the direction changing bevel case 20. Thus, deceleration transmission between both shafts 22 and 16 can be performed. Further, the input pulley 16A of the cylinder input shaft 16 is formed by a large and small two-stage pulley having a large diameter, and the transmission power from the output shaft 22 of the direction changing bevel case 20 is reduced by two stages. It can be changed in stages, so that it can be used properly for soybean threshing and red bean threshing.

[Another embodiment]
[1] In the embodiment, a structure using a bucket conveyor as the lifting device 48 and the second reduction device 49 is shown, but instead of this, the lifting device 48 and the second reduction device 49 may be configured by a screw conveyor. good.

[2] In the embodiment, the structure in which the input to the threshing device 4 is performed from the handling cylinder input shaft 16 at the rear of the threshing device 4 is shown. You may make it input into the treatment cylinder 41 from the front side of the threshing apparatus 4. FIG. In this case, since the direction-changing bevel case 20 is disposed on the front side of the threshing device 4, the gap s between the side wall 4 </ b> A of the threshing device 4 and the lifting device 48 or the second reduction device 49. It is not necessary to dispose the first transmission belt 33 on the side.

[3] In the embodiment, the all-fired type combine is exemplified, but the combine may be a self-removing type.

Combine side view Top view around combine thresher Transmission system diagram Longitudinal side view of threshing device Side view of threshing device Rear view of threshing device and grain tank part Sectional drawing which shows the transmission system in the lower part side of a threshing device Partial cross section of chaff sheave The cross-sectional view of the char flip plate is shown, (A) is a cross-sectional view taken along line aa in FIG. 8, (B) is a cross-sectional view taken along line bb in FIG. Cross section of another cha-flip plate

Explanation of symbols

DESCRIPTION OF SYMBOLS 4 Threshing apparatus 4A Side wall 4B Rear wall 5 Grain tank 14 Countershaft 15 Relay shaft 16 Handling cylinder input shaft 20 Direction change bevel case 25 Belt type continuously variable transmission 41 Handling cylinder

Claims (4)

In the combine where the threshing device and the grain recovery device are mounted in parallel on the left and right in the traveling machine body, and the engine is arranged in front of the grain recovery device,
A transmission system from the engine to the threshing device is configured with a belt transmission mechanism,
In this belt transmission mechanism, a relay device is provided for changing the direction in which both transmission belts are stretched between the upper transmission belt and the lower transmission belt in the transmission direction,
A combine is provided with a belt-type continuously variable transmission capable of changing the rotation speed of the barrel, closer to the transmission side than the relay device. The belt transmission mechanism extends rearward along the lateral wall of the threshing device, and is arranged to input a handling cylinder driving force from the rear side of the threshing device,
On the lateral side of the threshing device, a conveyor that lifts and conveys the grain threshed by the threshing device to the grain collecting device side is disposed at a distance from the side wall of the threshing device. The combine according to claim 1, wherein the belt transmission mechanism is disposed throughout the interval. The relay device is constituted by a direction changing bevel case that changes the direction between the upper transmission belt and the lower transmission belt in the transmission direction so that the rotation surfaces of both transmission belts face each other. ,
In this direction-changing bevel case, the rotation surface of the transmission belt on the upper side in the transmission direction is along the lateral wall of the threshing device, and the rotation surface of the transmission belt on the lower side in the transmission direction is along the rear wall of the threshing device, The combine according to claim 2, wherein the position of the belt winding pulley is set. The direction-changing bevel case is arranged above the rear part of the threshing device, and the upper transmission belt for input to the direction-changing bevel case is moved up and down on the rear side of the machine from the location of the conveyor for transferring the grain. The combine according to claim 3, wherein the belt type continuously variable transmission device is configured by using the transmission belt disposed between two shafts separated from each other.

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